发表机构
Institute of Space Sciences (ICE, CSIC); Visva-Bharati University; ICREA（空间科学研究所; 维斯瓦-婆罗蒂大学; 加泰罗尼亚高级研究学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究构建9种结合广义熵与扩展红外截断的全息暗能量模型，经多观测数据约束后发现高阶红外截断更受支持，Barrow熵与Ḧ/H截断组合拟合最佳，S₃、S₅暗能量EoS具 quintessence类行为和phantom穿越特征。
AI 中文摘要
我们研究由广义熵泛函和局域红外截断构建的全息暗能量模型。将三种熵（Barrow熵、三参数广义熵S₃、五参数广义熵S₅）分别与Granda-Oliveros（GO）截断及两种扩展形式结合：一种添加γH⁻²项，另一种添加γḦ/H项（后者将暗能量演化方程提升至二阶）。通过MCMC分析，结合DESI DR2 BAO、Pantheon+和Planck压缩CMB似然对这9种模型进行约束，并使用赤池信息准则和贝叶斯信息准则进行比较。所有模型的哈勃常数均稳定；H⁻²项在所有情形下无约束，因其仅在遥远未来相关，且未优于GO截断；而Ḧ/H项在Barrow熵和S₅模型中受到严格约束，可显著改善拟合，但在S₃模型中不行。最佳拟合结果来自Barrow熵与Ḧ/H截断的组合，不过所有情形下Barrow指数仍与零兼容。数据因此支持高阶红外截断，且未显示明显证据表明偏离贝肯斯坦-霍金面积律。我们还研究了S₃和S₅的暗能量状态方程（EoS），发现其具有 quintessence类行为和 phantom穿越特征。
英文摘要
We study holographic dark energy models constructed from generalized entropy functionals and local infrared cut-offs. Three entropies (Barrow and the three and five-parameter generalized entropies) are each combined with the Granda-Oliveros (GO) cut-off and two extensions, one adding a $γH^{-2}$ term and one a $γ\ddot{H}/H$ term, the latter raising the dark-energy evolution equation to second order. The nine resulting models are constrained against DESI DR2 BAO, Pantheon+ and a Planck compressed CMB likelihood through an MCMC analysis, and compared using the Akaike and Bayesian information criteria. The Hubble constant is stable across all models. The $H^{-2}$ term is unconstrained in every case, as it becomes relevant only in the far future, and never improves on the GO cut-off. The $\ddot{H}/H$ term, instead, is tightly constrained for Barrow and $S_5$, where it improves the fit substantially, but not for $S_3$. The best fit is obtained for Barrow entropy with the $\ddot{H}/H$ cut-off, yet the Barrow exponent remains compatible with zero in all cases. The data thus favour a higher-order infrared cut-off, while showing no significant evidence for a departure from the Bekenstein-Hawking area law. We also investigate the dark energy equation of state (EoS) of $S_3$ and $S_5$, discovering quintessence-like behavior and phantom crossing.
Comments21 pages, 11 figures
